We describe here the (yes, complicated) relationships between : Focal Length F-Number (=F#) Entrance Pupil Exit Pupil Viewing Angle Chief Ray Angle Image Circle Object side and image side principal planes
Resolution What is it in general? Resolution describes in general the ability of a “system” to provide “details”. Systems can be anything, a thermometer , a speedometer in a car, a TV screen, a printer, … and last but not least cameras and lenses.
Some centuries ago, people noticed with some surprise, that in a dark room sometimes an (upside down) image of the environment is projected across a small opening in a wall. The old latin word for room (chamber) is camera. That’s why the first cameras got the name “camera obscura” ( = “dark chamber”). One of […]
